Anti-cracking duplex stainless steel valve casting

Abstract

The utility model relates to an anti-cracking duplex stainless steel valve casting, which belongs to the technical field of stainless steel valve castings and comprises a stainless steel valve body, connecting pipes are fixed on the left side and the right side of the stainless steel valve body, a limiting ring is fixed between the inner walls of the stainless steel valve body, and a valve plate is slidably connected in the stainless steel valve body. A control mechanism is arranged on the stainless steel valve body, and a filtering mechanism is arranged in the stainless steel valve body. The control mechanism comprises a valve rod rotationally connected to the top face of the stainless steel valve body, a supporting plate is fixed between the inner walls of the stainless steel valve body, and the top face of the supporting plate is in threaded connection with a screw rod with the bottom end rotationally connected with the top face of the valve plate. According to the anti-cracking duplex stainless steel valve casting, the valve rod drives the screw rod to rotate, then the valve plate is driven to move up and down, opening and closing of a valve are achieved, meanwhile, the situation that the valve plate moves due to fluid pressure impact can be avoided through threads of the screw rod, and the stability of the valve in the opening or closing state is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel valve castings, in particular to a crack-proof duplex stainless steel valve casting. Background Art

[0002] Stainless steel valves refer to valves made of stainless steel materials. They have the characteristics of small size, light weight, good corrosion resistance and crack resistance. They are suitable for flow control of liquids and gases and are widely used in chemical, petrochemical, petroleum, papermaking, mining, electricity, liquefied gas, food, pharmaceuticals, water supply and drainage, municipal administration, mechanical equipment supporting, electronics industry, urban construction and other fields.

[0003] For example, a Chinese patent (publication number: CN217815004U) discloses a crack-proof duplex stainless steel valve casting, including a casting body, flanges are provided on both sides of the casting body, a mounting seat is fixedly provided at the bottom end of the casting body, a branch pipe is provided at the top end of the casting body, a valve core is provided inside the casting body, a fixing block is fixedly provided on the front surface wall of the valve core, a valve stem is passed through the top end of the casting body, the valve stem is located on one side of the branch pipe, the valve stem extends to the inside of the fixing block, bolts are threaded on both sides of the fixing block, and the firmness of the connection between the valve stem and the valve core can be increased by inserting the valve stem into the fixing block on the outer wall of the valve core, and the valve stem can be prevented from slipping out of the fixing block under the action of the bolts. When the valve stem or valve core needs to be replaced, the bolts can be unscrewed from the fixing block, and the valve stem can be pulled out from the fixing block, so that the valve core and the valve stem can be separated, and they can be replaced separately to avoid wasting resources.

[0004] However, the above-mentioned search patent still has some shortcomings. When it is in use, the valve stem is used to drive the valve core to flip, thereby realizing the opening and closing of the valve. The valve stem and the valve core lack a locking structure. When in use, the valve core is easily automatically flipped due to the impact pressure of the fluid, thereby reducing the stability of the valve when it is closed or opened. It is inconvenient to use, so an anti-cracking duplex stainless steel valve casting is proposed to solve the above problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a crack-resistant duplex stainless steel valve casting having advantages such as good stability, and solves the problem of poor stability of the valve disclosed in the above-mentioned search patent during use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crack-proof duplex stainless steel valve casting, comprising a stainless steel valve body, connecting pipes are fixed on both sides of the stainless steel valve body, a limiting ring is fixed between the inner walls of the stainless steel valve body, a valve plate is slidably connected to the stainless steel valve body, a control mechanism for controlling the up and down movement of the valve plate is provided on the stainless steel valve body, and a filtering mechanism is provided in the stainless steel valve body;

[0007] The control mechanism includes a valve stem rotatably connected to the top surface of the stainless steel valve body, a rotating plate is fixed to the top end of the valve stem, a support plate is fixed between the inner walls of the stainless steel valve body, the top surface of the support plate is threadedly connected to a screw rod whose bottom end is rotatably connected to the top surface of the valve plate, the top surface of the screw rod is provided with a slot for the valve stem to be inserted, the top surface of the valve plate is fixed with two guide rods that vertically penetrate the support plate and are slidably connected to the support plate, the bottom surface of the valve plate is fixed with a sealing block, and the bottom surface of the valve plate is fixed with a sealing ring.

[0008] Furthermore, the filtering mechanism includes a sealing cover threadedly connected to the bottom surface of the stainless steel valve body, a sealing gasket is fixed on the inner bottom wall of the sealing cover, two support rods are fixed on the inner bottom wall of the sealing cover, a limiting plate is fixed on the outer peripheral wall of the support rod, a filter plate is inserted at the top end of the two support rods, and two positioning grooves for inserting the support rods are provided on the bottom surface of the filter plate.

[0009] Furthermore, the stainless steel valve body is a cylindrical body with a hollow interior and an open bottom, the connecting pipe is arranged horizontally, the connecting pipe on the left and the connecting pipe on the right are staggered up and down, and the connecting pipe on the right is higher than the connecting pipe on the left, and the limiting ring is arranged between the two connecting pipes.

[0010] Furthermore, the bottom end of the valve stem extends into the interior of the stainless steel valve body, the outer peripheral wall of the valve stem is cylindrical near the top, the outer peripheral wall of the valve stem is square near the bottom, and the valve stem is rotatably connected to the stainless steel valve body through a sealed bearing.

[0011] Furthermore, the top surface of the support plate is provided with a threaded hole for the screw to pass through and match with it, the slot is a square slot and is used for the valve stem to slide up and down inside it, the top surface of the support plate is provided with two guide holes for the guide rod to pass through and match with it in a clearance, and the sealing ring is a rubber ring.

[0012] Furthermore, the sealing cover is a circular cover with a hollow interior and an open top surface. Matching threaded grooves are provided on the inner peripheral wall of the sealing cover and the outer peripheral wall of the stainless steel valve body near the bottom. The sealing gasket is a rubber gasket.

[0013] Furthermore, the limiting plate is close to the top end of the support rod, the top surface of the filter plate abuts against the bottom surface of the limiting ring, and the bottom surface of the filter plate abuts against the top surface of the limiting plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. When using the anti-crack duplex stainless steel valve casting, the stainless steel valve body is connected to the pipeline through two connecting pipes, and the fluid enters the left connecting pipe and is discharged from the right connecting pipe. When controlling the fluid, the valve stem drives the screw to rotate, and then drives the valve plate to move up and down to realize the opening and closing of the valve. At the same time, the thread of the screw can avoid the movement of the valve plate due to fluid pressure impact, thereby ensuring the stability of the valve in the open or closed state, with better practicality and easier to promote and use.

[0016] 2. The anti-crack duplex stainless steel valve casting has a filtering mechanism on the stainless steel valve body. When the stainless steel valve body is used to control the flow of fluid, the filter plate can filter the fluid and remove impurities in the fluid. The sealing cover can be used to easily open the bottom of the stainless steel valve body to process the filtered impurities and the filter plate, further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the utility model;

[0018] Figure 2 It is a front cross-sectional schematic diagram of the main body of the utility model;

[0019] Figure 3 It is a three-dimensional schematic diagram of the valve stem of the utility model;

[0020] Figure 4 For this utility model Figure 2 A magnified schematic diagram of center A.

[0021] In the figure: 1 stainless steel valve body, 2 connecting pipe, 3 limit ring, 4 valve plate, 501 valve stem, 502 rotating plate, 503 support plate, 504 screw, 505 slot, 506 guide rod, 507 sealing block, 508 sealing ring, 601 sealing cover, 602 sealing gasket, 603 support rod, 604 limit plate, 605 filter plate, 606 positioning groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 In this embodiment, a crack-proof duplex stainless steel valve casting comprises a stainless steel valve body 1, connecting pipes 2 are fixed on both sides of the left and right sides of the stainless steel valve body 1, and a limiting ring 3 is fixed between the inner walls of the stainless steel valve body 1. The stainless steel valve body 1 is a cylindrical body with a hollow interior and an opening on the bottom. The connecting pipe 2 is arranged horizontally, and the left connecting pipe 2 and the right connecting pipe 2 are staggered up and down, and the right connecting pipe 2 is higher than the left connecting pipe 2. The limiting ring 3 is arranged between the two connecting pipes 2. A valve plate 4 is slidably connected in the stainless steel valve body 1, and a control mechanism for controlling the upward and downward movement of the valve plate 4 is provided on the stainless steel valve body 1. When in use, the stainless steel valve body 1 is moved through the two connecting pipes 2. A connecting pipe 2 is connected in the pipeline, and the fluid enters the right connecting pipe 2 from the left connecting pipe 2 and is discharged. When controlling the fluid, the valve plate 4 is driven up and down by the control mechanism to realize the opening and closing of the valve. At the same time, the control mechanism can avoid the movement of the valve plate 4 due to the impact of fluid pressure, thereby ensuring the stability of the valve in the open or closed state. It has better practicality and is more convenient for promotion and use. A filtering mechanism is provided in the stainless steel valve body 1, and a filtering mechanism is provided on the stainless steel valve body 1. When the stainless steel valve body 1 is used to control the flow of fluid, it can filter the fluid and remove impurities in the fluid, thereby further improving the practicality of the device.

[0024] See also Figure 1-4The control mechanism includes a valve stem 501 rotatably connected to the top surface of the stainless steel valve body 1, a rotating plate 502 is fixed to the top of the valve stem 501, a support plate 503 is fixed between the inner walls of the stainless steel valve body 1, a screw 504 is threadedly connected to the top surface of the support plate 503 with the bottom end rotatably connected to the top surface of the valve plate 4, a slot 505 is provided on the top surface of the screw 504 for the valve stem 501 to be plugged in, and two guide rods 506 are fixed on the top surface of the valve plate 4 that vertically penetrate the support plate 503 and are slidably connected thereto. When the valve plate 4 needs to be controlled, the rotating plate 502 is rotated, and the rotating plate 502 drives the valve stem 501 to rotate, and the valve stem 501 is inserted into the top surface of the screw 504. The groove 505 drives the screw 504 to rotate, and the screw 504 moves up and down along the support plate 503, and then cooperates with the guide rod 506 to move up and down to realize the opening and closing of the stainless steel valve body 1. At the same time, the self-locking characteristics of the screw thread 504 are used to ensure the stability of the valve plate 4 in the current state. A sealing block 507 is fixed to the bottom surface of the valve plate 4, and a sealing ring 508 is fixed to the bottom surface of the valve plate 4. When the valve plate 4 moves downward to close the stainless steel valve body 1, the sealing block 507 on the bottom surface of the valve plate 4 will be inserted into the limiting ring 3, and the valve plate 4 cooperates with the limiting ring 3 to squeeze the sealing ring 508 for sealing, thereby ensuring the sealing of the stainless steel valve body 1 when it is closed.

[0025] The bottom end of the valve stem 501 extends into the interior of the stainless steel valve body 1, the outer peripheral wall of the valve stem 501 is cylindrical near the top, and the outer peripheral wall of the valve stem 501 is square near the bottom. The valve stem 501 is rotatably connected to the stainless steel valve body 1 through a sealed bearing, and a threaded hole for the screw 504 to penetrate and match with it is opened on the top surface of the support plate 503. The slot 505 is a square slot and is used for the valve stem 501 to slide up and down inside it. The direction slot 505 is set to cooperate with the valve stem 501 for transmission, so as to facilitate the rotation of the screw 504. The screw 504 is driven by the valve stem 501 to avoid directly opening a threaded hole on the top surface of the stainless steel valve body 1, so as to facilitate the sealing of the top of the stainless steel valve body 1. The top surface of the support plate 503 is provided with two guide holes for the guide rod 506 to penetrate and match with it, and the sealing ring 508 is a rubber ring.

[0026] See also Figure 2 and Figure 4In this embodiment, the filtering mechanism includes a sealing cover 601 threadedly connected to the bottom surface of the stainless steel valve body 1, a sealing gasket 602 is fixed on the inner bottom wall of the sealing cover 601, two support rods 603 are fixed on the inner bottom wall of the sealing cover 601, and a limit plate 604 is fixed on the outer peripheral wall of the support rod 603. The top ends of the two support rods 603 are plugged with a filter plate 605. When the stainless steel valve body 1 controls the flow of fluid, the fluid flow will be filtered through the filter plate 605 to remove impurities in the fluid. The bottom surface of the filter plate 605 is provided with two There is a positioning groove 606 for the support rod 603 to be inserted. When it is necessary to clean the filtered impurities and the filter plate 605, the sealing cover 601 is rotated to separate it from the stainless steel valve body 1, and then the filter plate 605 can be removed for cleaning. At the same time, the filtered impurities are discharged from the bottom of the stainless steel valve body 1. When the cleaning is completed, the support rod 603 is inserted into the positioning groove 606, and then the sealing cover 601 is screwed on the bottom end of the stainless steel valve body 1, and the filter plate 605 is abutted against the bottom of the limit ring 3 through the support rod 603 and the limit plate 604.

[0027] The sealing cover 601 is a circular cover with a hollow interior and an open top surface. Matching threaded grooves are provided on the inner circumferential wall of the sealing cover 601 and the outer circumferential wall of the stainless steel valve body 1 near the bottom. The sealing gasket 602 is a rubber gasket. The limiting plate 604 is close to the top end of the support rod 603. The top surface of the filter plate 605 abuts against the bottom surface of the limiting ring 3, and the bottom surface of the filter plate 605 abuts against the top surface of the limiting plate 604.

[0028] The working principle of the above embodiment is:

[0029] (1) When the valve plate 4 needs to be controlled, the rotating plate 502 is rotated, and the rotating plate 502 drives the valve stem 501 to rotate. The valve stem 501 drives the screw 504 to rotate through the slot 505. The screw 504 moves up and down along the support plate 503, and then cooperates with the guide rod 506 to move up and down to realize the opening and closing of the stainless steel valve body 1. At the same time, the thread self-locking property of the screw 504 is used to ensure the stability of the valve plate 4 in the current state. When the valve plate 4 moves down to close the stainless steel valve body 1, the sealing block 507 on the bottom surface of the valve plate 4 will be inserted into the limiting ring 3, and the valve plate 4 cooperates with the limiting ring 3 to squeeze the sealing ring 508 for sealing, thereby ensuring the sealing of the stainless steel valve body 1 when it is closed;

[0030] (2) When the stainless steel valve body 1 controls the flow of fluid, the fluid will be filtered through the filter plate 605 to remove impurities in the fluid. When it is necessary to clean the filtered impurities and the filter plate 605, rotate the sealing cover 601 to separate it from the stainless steel valve body 1, and then remove the filter plate 605 for cleaning. At the same time, the filtered impurities are discharged from the bottom of the stainless steel valve body 1. When the cleaning is completed, insert the support rod 603 into the positioning groove 606, and then screw the sealing cover 601 on the bottom end of the stainless steel valve body 1. The filter plate 605 is abutted against the bottom of the limit ring 3 through the support rod 603 and the limit plate 604.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crack-resistant duplex stainless steel valve casting, comprising a stainless steel valve body (1), characterized in that: Connecting pipes (2) are fixed on both left and right sides of the stainless steel valve body (1), a limiting ring (3) is fixed between the inner walls of the stainless steel valve body (1), a valve plate (4) is slidably connected inside the stainless steel valve body (1), a control mechanism for controlling the upward and downward movement of the valve plate (4) is provided on the stainless steel valve body (1), and a filtering mechanism is provided inside the stainless steel valve body (1); The control mechanism comprises a valve stem (501) rotatably connected to the top surface of the stainless steel valve body (1), a rotating plate (502) is fixed to the top of the valve stem (501), a support plate (503) is fixed between the inner walls of the stainless steel valve body (1), the top surface of the support plate (503) is threadedly connected to a screw rod (504) whose bottom end is rotatably connected to the top surface of the valve plate (4), the top surface of the screw rod (504) is provided with a slot (505) for the valve stem (501) to be inserted, the top surface of the valve plate (4) is fixed with two guide rods (506) that vertically penetrate the support plate (503) and are slidably connected thereto, the bottom surface of the valve plate (4) is fixed with a sealing block (507), and the bottom surface of the valve plate (4) is fixed with a sealing ring (508).

2. The anti-cracking duplex stainless steel valve casting according to claim 1, characterized in that: The filtering mechanism comprises a sealing cover (601) threadedly connected to the bottom surface of the stainless steel valve body (1); a sealing gasket (602) is fixed on the inner bottom wall of the sealing cover (601); two support rods (603) are fixed on the inner bottom wall of the sealing cover (601); a limiting plate (604) is fixed on the outer peripheral wall of the support rods (603); a filtering plate (605) is inserted at the top end of the two support rods (603); and two positioning grooves (606) for the support rods (603) to be inserted are provided on the bottom surface of the filtering plate (605).

3. The anti-cracking duplex stainless steel valve casting according to claim 1, characterized in that: The stainless steel valve body (1) is a cylindrical body with a hollow interior and an open bottom. The connecting pipe (2) is arranged horizontally. The connecting pipe (2) on the left side and the connecting pipe (2) on the right side are staggered in vertical direction, and the connecting pipe (2) on the right side is higher than the connecting pipe (2) on the left side. The limiting ring (3) is arranged between the two connecting pipes (2).

4. The anti-cracking duplex stainless steel valve casting according to claim 1, characterized in that: The bottom end of the valve stem (501) extends into the interior of the stainless steel valve body (1); the outer peripheral wall of the valve stem (501) is cylindrical near the top; the outer peripheral wall of the valve stem (501) is square near the bottom; the valve stem (501) is rotatably connected to the stainless steel valve body (1) via a sealed bearing.

5. The anti-cracking duplex stainless steel valve casting according to claim 1, characterized in that: The top surface of the support plate (503) is provided with a threaded hole for the screw rod (504) to pass through and match with it, the slot (505) is a square slot and is used for the valve stem (501) to slide up and down inside it, the top surface of the support plate (503) is provided with two guide holes for the guide rod (506) to pass through and match with it in a clearance, and the sealing ring (508) is a rubber ring.

6. The anti-cracking duplex stainless steel valve casting according to claim 2, characterized in that: The sealing cover (601) is a circular cover with a hollow interior and an open top surface. Matching threaded grooves are provided on the inner peripheral wall of the sealing cover (601) and the outer peripheral wall of the stainless steel valve body (1) near the bottom. The sealing gasket (602) is a rubber gasket.

7. The anti-cracking duplex stainless steel valve casting according to claim 2, characterized in that: The limiting plate (604) is close to the top end of the support rod (603), the top surface of the filter plate (605) abuts against the bottom surface of the limiting ring (3), and the bottom surface of the filter plate (605) abuts against the top surface of the limiting plate (604).

Images